finlayson



T. FINLAYSON.

CASEMENT ADJUSTER. APPLICATION man Aumlhsia.

2 sHEEslnl.

/W my Patented' De 1919.

TL HNLAYSON.

CASE ENT AmusrER.

LED AUG' APPLICATION FI .46| 1918.

1,326,042. l Patented Dec. 23,1919.

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THOMAS FINLAYsoN, or OAKLAND, CALIFORNIA.

CASEIJIENT-ADJUSTER.

To all whom t may concern Be it known that I, THOMAS FINLAYsoN, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Casement- Adjusters; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification. Y

Myinvention relates to a locking device for a easement window or any other forms of pivotedor swinging closure, and has for its object the simplification of such locking device and the lowering of the cost of producing the same. A-further object of the invention is to provide an adjuster Vor lockf ing device that mayv be securely and in` stantly locked inany position within the range of movement ofthe swinging closure.

I attain these objects by the mechanism illustrated in the accompanying drawings forming a part 0f this specification, and in which,

Figure 1 represents a plan view of iny device as applied to a casement window;

Fig. 2 represents a side elevation of the same;

Fig. 8 is a sectional view looking downward on line 3--8 of Fig. 2;

Fig. t is a vertical cross sect-ion through one end of the locking device;

\ Fig. 5 is a vertical cross section through' the center of the lever, taken at right angles to Fig. 4; Y y l Fig. 6 is a similar view but showing the lever locked;

Fig. 7 is a considerably enlarged view taken through the tube and rod which form my locking device and shows these two parts in their unlocked position; and

Fig. 8 shows a similar'section but showT ing the device as locked.

In the drawings, 9 represents a window sash hinged as at 10 to a frame of the usual type 11. Secured by screws or other fastenings 12 to the sill of the window is a bracket member 14, the central portion of which is struck up as at 15 to form a pivotal connection with the enlarged end 16 of bracket member' 17, the latter forming a support for one part of the locking device. The bracket member 14 is preferably provided with a stop 18 coperating with the lug 19 on the Specification of Letters Patent.

Patented Dec. 23, 1919.

Application filed August 1G, 1918. Serial No. 250,229.

givoted support 17 to limit the opening movement of the window sash, as shown in dotted lines in Fig. l. The upper cylindrical part 20 of the support 17 rotatably receives one end of a tube 21, which is perforated as at 22 to receive the rivet end 23 of a lever 24 having an extended bearing piece 25 and a linger piece 2G. The bearing piece 25 is received in a slot 27 ycentrally of the cylindrical portion 20, this arrangement preventing longitudinal movement of the tube with respect to the support 17 or bracket 14C, but permitting oscillation or partial rotation of the tube in the support within the limits of the slot 27. A rod 28 telescopes within the tube 21 and is freely slidable therein when these two parts are in the position show n in Fig. 7, but the rod wedges against the sides of the tube when either part is rotated so as to bring them in the position shown in Fig. 8.

A considerable portion of the cross section of the rod 28 is an arc taken from a center 29, such arc ruiming from the point 30 to the point 81, the remainder of the cross section of such rod beinga gradually increasing wedge beginning at point 3() and increasing as far as point 32. The outer member of the locking device, that is, the tube 21, has an interior cross section identical in shape with that of the cross section of the rod 28, but is, of course, slightly larger in order to permit the parts to freely slide when in proper position. When either of the parts of my locking device is rotated about its axis, which, it will be understood, is nota definite line in the center of such element, owing to the fact that neither is a perfect right cylinder, the wedge of the rod will be forced against the interior surface of the tube, as at 33 and will form a surface contacttherewith and at the same time will form a surface contact at the point 34, this in contradistinction to the single line contact that will be formed if the tube and rod were each made elliptical in cross section.

The rod 28 is perforated at its free end, as at 35 to receive an anchor screw 36 fastened to the window sash and preferably carrying a small wear piece 37 to prevent injury to the sash. The perforation 35 is preferably round in front and elongated or oval shaped at the rear endto allow for the movement of the parte, without making the hole sufficiently large to permit of the looseness which would be required for such movement, if the hole were cylindrical.

It will thus be seen that the rod is held against rotation on its axis by the connection with the anchor screw 36 and that the tube 21 is held against longitudinal movement by the sliding contact between the bearing piece 25 and slot 27, both tube and rod having an oscillating movement about the lever 24 as the center, while the window sash 9 turns on its pivot pin l0, such movement of the window sash requiring an extension of the locking device as will be seen from the dotted lines in Fig. 1. This withdrawal of the rod from the tube and its telescoping therein on the return movement of the window sash is freely permitted as long as the lever 2liis in vertical position, but when such lever and with lit the tube is turned to the right, as viewed in Fig. 7 the tube and rod are securely locked together by friction and the window sash held firmly in place. A very slight movement of the lever causes a very considerable friction between the two parts and since both rod and tube are of uniform cross section and the wedge, that is, the portion of the rod outside of right cylinder formation is so slight that an extremely fine adjustment of the window sash or other closure can be secured.

Although l have shown my device in connection with a Casement window sash as an adjuster therefor, l do not wish my invention to be so limited. Since the turning of the lever could be done by steam or any other power, as well as by hand, my device is well suited to use in connection with dock gates, doors of water-tight bulkheads, vaults, etc., because of its speed and trei'x'xeiulous power.

What is ela-:hned is:

l. ln combination with a rigid tube having an internal cylinifh'ieal surface of canishaped cross section, of a rod telescoping therein and having` a uniform cam-shaped cross section throughout its length, adapted to make a surface contact of appreciable length and width with the interior surface of the tube.

2. ln combination with a non-expansible tube having an internal cylindrical surface of cam-sl1aped cross section, a portion of such cross section being' the arc of a circle,

of a rod of. similar shaped cross. section freely telescoping with said tube in one relative position of. the parts but adapted to make a surface Contact of appreciable length and width with the interior surface of the tube whereby it is frictionally held against longitudinal movement when either of the parts is angularly moved with respect to the other part.

3. In combination with a tube having an internal cylindrical surface of cam-shaped cross section, a portion of such cross section heilig' the arc of a circle, of a rodof similar shaped cross section freely telescoping with said tube in one relative position of the parts but adapted to make a surface contact of appreciable length and width with the interior surface of th-e tube whereby it is frictionally held against longitudinal movement when either of the parts is angularly moved with respect to the other part, and means for altering the angular relation of said parts.

4. In' combination with a tube having an internal cylindrical surface of cam-shaped cross section, a portion of such cross section being the arc of a circle, of a rod of similar shaped cross sectionfreely telescoping' with said tube in one relativeposition of the parts but adapted to make a surface contact of appreciable length and width with the interior surface of the tube where by it is frictionally held against longitudinal movement when either of the parts is angularly moved with respect to the other part, means for holding one .of said parts against angular movement, and means for angularly moving the other of said parts.

5. In combination with a rigid tube having' an unbroken internal cylindrical surface of cam-shaped cross section, a portion of such cross section being the are of a circle, of a rod having an unbroken surface and of similar shaped cross-section freely telescoping with said tube in one relative position of the parts but frictionally held against longitudinal movement by a plurality ofsurface contacts when either of the parts is angularly moved with respect to the other part, means 'for holding one of said parts against angular movement, and means for pivotally supporting the other of said parts and for angularly moving the same with respect to an approximate axis of same.

THOMAS FINLAYSON. 

